Inductor-alternator



H. I. PonIIAK.

INDUCTOR ALTERNATOR.

APPLICATION FILED ngc. Ie. 1916.

1,329, 926. v Patented Feb. 3, 1920.

2 SHEETS--SHEET1.

H. 1, PUDLEAK.

INDUCTOR ALTERNATOR.

APPUCATION FILED DEC. I6. 1916.

1,329,926. Patented Feb. 3,1920.

w ,im 'l '1" Lk Il WWA/5555s mm /NV'ENTOR UNITED sTATEs PATENT oEEioE.

HENRY JOSEPH PODLEK, OF CHICAGO, ILLINOIS, ASSIGNOR TO SPLITDORF ELEC- i TRICAL COMPANY, OF NEWARK, NEW JERSEY, A CORPORATION OF NEW YORK.

INDUCTOR-ALTERNATOR.

Application filed December 16, 1916.

f/o all who/1t t may concern.'

Be it known that I, HENRY J PoDLEsAK,

. a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Inductor-Alternators, of which thejfollowing is a specification, reference being had to the accompanying drawing.

The invention relates to new and useful improvements in inductor generators and more particularly to an inductor alternator which is particularly adapted for ignition purposes.

In Patent No. 1,056,860, granted March 18, 1913, to T. E Podlesak and H. J. Podlesak, an inductor alternatoizis described which includes primarily a permanent magnet provided with a pair of pole pieces eachof which carries two polar projections terminating in cylindrical polar surfaces and one of the polar projections is provided with generating windings while the other is unwound.

Cooperating with these polar projections is an unwound inductor which is adapted to i short circuit the magnetic flux through thc unwound polar projections when in one posi tion and through the wound polar projections when in another position..

The present invention is directed to an improvement in the inductor alternator set forth in said patent and one of the objects of the invention .is to provide a construction of polar projection wherein the reluctance through the unwound projections is reduced, thereby facilitating rapid diverting of the magnetic'flux through the unwound polar projections.

A further object of the invention is to provide an inductor alternator of the above Y character wherein the inductor is provided with three prongs which are so shaped and spaced relative to the polar projections as to short circuit the magnetic flux through the lunwound polar projections when in one position and through the wound polar projec@ tions when in another position.

These andl other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings which show by way of illustration one embodiment of the invention Figure 1 is a view partly in end elevation Specification of LettersPatent.

- lateral polar extensions;

Patented Feb. 3, 1920.

serial No. 137,342.

and partly in vertical section through an inductor alternator embodying my limprovement and showing the same attached to the franie of an engine;

Fig. 2 is a view partly in side elevation 60 through the `bracket which'supports the 65v same;

Fig. 4l is a horizontal sectional view on the line 1*4 of Fig. l;

Fig. 5 is'a perspective view of one of the Fig. 6 is a View showing more or less dia- I grannnatically the poles of the magnet, the

polar projections and the inductor, said inductor being shown 1n full ylines in normal stationary position and in ydotted lines in position for short circuiting the wound polar projections and in broken lines the position for short circuiting the unwound polar projections.

The`invention is directed broadly to an v alternator inductor which includes a permanent magnet having pole pieces and'each pole piece is in the form of two polar projections the inner faces'of which are cylindrical. of the pole pieces is provided with windings so that there are Opposedwound polar l projections and opposed unwound polar projections. Mounted to oscillate betweenth'ese One of the polar projections of each polar projections is an inductor which is a three prong inductor and this three prong inductor is so constructed that when in one position itl will short circuit the wound polar projections and while in lanother position it lwill short circuit the unwound polar projections.

At each side of the lower unwound polar projections there is a lateral extension made of magnetic material and magnetically conf nected to the pole pieces and these lateral 100 extensions increase the polar faces of said unwound polar projections. By this construction the reluctance through the i unwound projections is much reduced thereby facilitating the rapid diverting of the magnetic flux through the unwound projections. This feature is of especial advantage in an .Oscillating inductor. These lateral eXtensions may be of any desired width although they are preferably just a little wider than pieces the depth of the winding on the wound polar projections. ,I

Referring more in detail to the drawings,

my improved inductor alternator consists of a permanent magnet 1, having a pair of pole pieces 2. Extending inwardly from the pole 2, are polar projections 3 on each of mounted a generating winding il.

to oscillate between these polar projections 3. Said inductor is formed with three prongs indicated at 6. The surface of each polar pro-v jection 3 is cylindrical, as indicated'at 7 in the drawings. Spaced from the polar projections 3 are unwound polar projections indicated at 9 in the drawing and these polar projections are provided with cylindrical faces 8 which also cooperate with the inductor 5. The polar projection 3 has a generating winding 4 thereon7 and at each side of the polar projection 9, which corresponds with the polar projection 3, there is a lateral extension 3S, see Figs. L1 and 5 of the drawings. 4These lateral extensions 38 are secured' to the pole pieces 2 by suitable screws or bolts 51, which also secure the laminations together forming the pole pieces. These lateral extensions 38 are of magnetic material and are so disposed and arranged as to increase the polar facesvof the polar projection 9. This increased face of the polar projection 9 reduces the reluctance through the unwound polar projection and thus facilitates the rapid diverting of the magnetic flux through these unwound polar projections. The extensions 33 may be of any width, but they are preferably a little wider than the depth of the winding et., so as to give comfortable clearance between the side plates 37 and the windings. 1t will be noted that the windings are on the upper projections and this removes the windings as far as possible from the fastening bolts and thus prevents danger of grounding.

The polar projections 3 and 9 are magnetically connected with the pole pieces and the magnet. The inductor 5 is mounted on a shaft 10 and this shaft is journaled in suitable bearings in the end plates 11 of the alternator. This shaft 10 carries at one end oppositely 'disposed arms7 one of which is indicated at 12 in the drawings. and this arm carries a pin 13 provided with a roller 14 with which one end of the spring 15 is connected. The other end of this spring 15 is connected with the roller 11 on a pin 1G mounted in turn on the bracket 17. The purpose of these springs 15 is to return the inductor to normal position when it is tripped thus oscillating the inductor for producing ignition current.

The alternator is mounted as a unit on a bracket 18 and is secured thereon by suitable bolts 19. This bracket 18 is carried by the igniter body or supporting frame 20,

which is An inductor 5 is mounted which in turn is bolted to the engine by the bolts 21. The igniter body has an inwardly projecting cylindrical portion 2Q which extends through the wall of the engine cylinder, vindicated at 41 in the drawings.

The inductor is actuated by a rod Q3 which is moved endwise by means of a crank pin 36 on the shaft 34 which rotates in a suitable bearing 35. This bearing is carried by a projectingarm 33 formed on the engine cylinder. The rod 23 rests on a roller 24 which is carried by an arm 25 mounted at Q6 on a bracket carried by the engine cylinder.

The rod 23 is adapted to engage the trip finger 3Q which is rigidly carried by the shaft of the inductor. Said rod 23 moving endwise in the direction of the arrow in Fig. 3, engages this trip finger and turns the inductor shaft. The rod 23 slipping off from the finger 462 releases the same and thus the springs 15 return the inductor to normal position. The movement of the rod 23 turns the inductor shaft in a clockwise direction, as viewed in Fig. 3, and this carries the arm 4:3 shown in the drawings as a part of the trip finger 4Q. away from the arm 44 which is attached to the movable electrode. The arm #la is secured to the movable elcctrode 45 which extends into the c vlinder and carries at its inner end an arm liti on which is mounted one of the contact points. The other contact point is carried by the fixed electrode 117. A screw 49 is adapted to be struck by the arm 43 when the inductor shaft is moved by the springs 15 to return the same to normal position and this causes the arm -ll to swing in a clockwise direction thus separating the contacts and causing the ignition spark.

The spring 5() is of lighter tension than the spring 15 and holds the contacts in engagement when the arm 43 has moved away from the arm il.

In Fig. 6 and indicated at a, l have shown in full lilies the inductor in normal position; in broken lines. at the inductor is shown in cocked position, that is, it has been moved to its extreme position by the rod 23; and in the broken lines position, as indicated at c the inductor has reached itsfull swing, when released or tripped through the action of the spring thereon.

It will be noted that when the inductor .is in the dotted line position indicated at l), then the magnetic `flux is short circuited through the wound polar projections. When the inductor is turned to the position indicated at c, that is, in broken lines, then the magnetic flux is short circuited through the l.unwound polar projections 9 Attention vis called to the fact that the ends of the prongs of the inductor are adapted to bridge the gap between the pole faces i' and 8 of the adjacent polar `projec-k tions. The bridging or lap of the inductor, is useful as dalnpening the excessive or peak of E. M. F., thus saving the insulation of the insulated electrodes from breaking down. It also helps to Widen the wave, the range, for operating Work.

From the above it will be apparent that I have provided a bipolar inductor alternator wherein a three prong rotor or inductor cooperates with the poles ot' a permanent magnet so as to short circuit the magnetic flux through the polar projections which carry the'generating windings when in one position and when in another position the magnetic flux is short circuited through the unwound polar projections and these unwound polar projections are extended so as to reduce the reluctance therethrough thus facilitatinga rapid diverting ot' the magnetic flux through these unwound polar projections and this greatlj increases the etliciency of an alternator of the oscillating type. It is obvious that minor changes in the details or" construction and arrangement of parts may be made without departing from the spirit of the invention. as set forth in the appended claims.

Having thus described in v invention, what I claim as new and desire to secure b v Letters Patent, is

l. An inductor generator comprising a field magnet provided with a pole piece at each pole thereof, each said pole pieceA having two polar projections terminating in polar faces. inductive windings carried b v one of the polar projections of each said pole piece. extensions on sides of the unwound polar projections. said extensions being of magnetic material. and an inductor adapted to vary the magnetic fiux through said polar projections.

2. An inductor generator including in combination, a permanent magnet. a pair of pole pieces arranged in magnetic contact with the poles of said magnet and opposed to each other. each pole piece having a pair of polar projections provided with cylindrical pole faces. a winding carried b v one of the polar projections on each pole piece, said wound polar projections being opposed to each other and at one side of the un wound polar projections, an inductor mounted on an axis concentric with the pole faces and between said polar projections. said inductor being adapted to short circuit the magnetic flux through the wound polar projections when in one position and through the unwound polar projections when in another position., said unwound polar projections having .lateral projections adapted to'reduce the reluctance through said unwound polar projections.

3. An inductor generator including in combination, a U-shaped permanent magnet having pole pieces, each pole piece having` two polar projections arranged one above the other, the upper polar projections having windings thereon the lower polar projections having extensions at each side thereof for reducing the reluctance therethrough and an inductor mounted to oscillate between the polar projections and adapted when in one position to short circuit the magnetic flux through the wound polar projections and when in another position to short circuit the magnetic fiux through the unwound polar projections.

4. An inductor generator including' in combination, a U-shaped permanent magnet having pole pieces. eachl pole piece having two polar projections arranged one above the other. the upper polar projection having windings thereon, the lower polar projection having extensions at each side thereofl for reducing the reluctance therethrough. a three prong inductor having its ends formed so as to bridge the space between the polar projections on each pole piece. said prongs being disposed so as to short circuit the magnetic tlux through the unwound polar projections when in one position and to short circuit the nnlgnetic iux thrmigh the wound polar projections when in another position.

An inductor generator including in combination, a permanent magnet having a pole piece with two polar projections thereon, a winding carried bj' one of, vsaid polar projections, lateral extensions carried b v the other of said projections, a pronged inductor mounted on an axis substantially concentric with the pole faces and inproxirnity to the pole faces to var v the magnetic flux therethrough. said polar projections and inductor heilig constructed and arranged so that the inductor short circuits the magnetic flux through the wound pola-r projection when in one position and through the un wound polar projection when in another position. In testimony whereofI hereunto affix my signature in the presence of two witnesses.

HENRY JOSEPH PODLESAK. lVitnesses y MAURICE S. ZEILER, V. CLARKE. 

